Finding the Third Proportional to 43.78 and 67.39

Step by Step Solution

1. Step 1: Write the proportion equation
   43.78 : 67.39 = 67.39 : x
2. Step 2: Convert to fraction form
   43.78/67.39 = 67.39/x
3. Step 3: Cross multiply
   43.78x = 67.39 × 67.39
4. Step 4: Simplify right side
   43.78x = 4,542.02
5. Step 5: Solve for x
   x = 4,542.02/43.78
6. Step 6: Final answer
   x = 103.74